本文首次报道了内蒙古西部额济纳盆地井下中生代地层中的孢粉植物群。该微体植物群的特征是，裸子植物花粉占绝对优势，蕨类孢子次之，早期被子植物花粉偶见。根据特征分子的出现情况，将这套地层的时代归入早白垩世早期，约在凡兰吟期至早巴列姆期范围内。 This paper reports for the first time the sporopollen assemblages in the Mesozoic strata below the Ejina Basin, western Inner Mongolia. The characteristics of the micro-flora are that the gymnosperm pollen is dominant, followed by the fern spore, and the early angiosperm pollen is occasionally seen. According to the appearance of the characteristic molecules, the age of this stratigraphic is classified as early Early Cretaceous, ranging from Vanlanin period to early Balmain period.